When our computers start slowing down or behaving in an unusual way, we are often quick to suspect that we have a virus. It might not be a virus, but it is likely that you have some sort of malware. Some are malicious, and others are just annoying.

1. Install Anti-Virus/Malware Software.This tip may go without saying, and I almost just casually mentioned it in my opening paragraph. However, I have seen many computers—especially home computers—that don’t have anti-virus/malware protection. This protection is a must-have first step in keeping you computer virus free.

2. Keep Your Anti-Virus Software Up to Date.Having protection software is the first step; maintaining it is the second. Free anti-virus software is better than nothing, but keep in mind that it’s not the best solution. Microsoft does provide a security package for “free.” It’s free in that if you have Windows on your machine, you are granted access, but you did pay for your Windows license. Many users aren’t aware of this program, but it’s actually decent protection.

3. Run Regularly Scheduled Scans with Your Anti-Virus Software.This too may seem like a no-brainer, but many of us forget to do this. Set up your software of choice to run at regular intervals. Once a week is preferred, but do not wait much longer between scans. It’s difficult to work on your computer while your anti-virus software is running. One solution is to run the software at night when you aren’t using your computer. However, we often turn off our computers at night, and so the scan never runs. Set your anti-virus software to run on a specific night, and always leave your computer running on that day. Make sure it doesn’t shut off automatically or go into hibernation mode.

4. Keep Your Operating System Current.Whether you are running Windows, Mac OS X, Linux, or any other OS, keep it up to date. OS developers are always issuing security patches that fix and plug security leaks. These patches will help to keep your system secure. Similarly, keep your anti-virus software up to date. Viruses and malware are created all the time. Your scanning software is only as good as its database. It too must be as up to date as possible.

5. Secure Your Network.Many of our computers connect to our files, printers, or the Internet via a Wi-Fi connection. Make sure it requires a password to access it and that the password is strong. Never broadcast an open Wi-Fi connection. Use WPA or WPA2 encryption. WEP is no longer strong enough as it can be bypassed in minutes by experts. It’s also a great idea to not broadcast your SSID (the name of your Wi-Fi network). You can still access it with your device, you will just have to manually type in the SSID and the password. If you frequently have guests who use your Internet, provide a guest SSID that uses a different password, just in case your friends are evil hackers.

6. Keep Your Personal Information Safe.This is likely the most difficult thing to do on the Internet. Many hackers will access your files not by brute force, but through social engineering. They will get enough of your information to gain access to your online accounts and will glean more of your personal data. They will continue from account to account until they have enough of your info that they can access your banking data or just steal your identity altogether. Be cautious on message boards and social media. Lock down all of your privacy settings, and avoid using your real name or identity on discussion boards.